diff --git a/package.json b/package.json
index 20b3777..e4c612c 100644
--- a/package.json
+++ b/package.json
@@ -1,15 +1,15 @@
 {
   "name": "family-friendly",
   "version": "1.0.0",
-  "description": "",
-  "main": "dist/app.js",
+  "description": "Detect or mask out, bad words in a string",
+  "main": "dist/FamilyFriendly.js",
   "engines": {
     "node": "18.x"
   },
   "scripts": {
     "build": "babel src -d dist --extensions \".ts,.tsx\"",
-    "start": "node dist/app.js",
-    "dev": "nodemon src/app.ts",
+    "start": "node dist/FamilyFriendly.js",
+    "dev": "nodemon src/FamilyFriendly.ts",
     "test": "jest",
     "test:watch": "jest --watch",
     "lint": "eslint . --ext .ts",
diff --git a/src/FamilyFriendly.ts b/src/FamilyFriendly.ts
new file mode 100644
index 0000000..74adb13
--- /dev/null
+++ b/src/FamilyFriendly.ts
@@ -0,0 +1,115 @@
+import { badArabicWords } from "./words/arabic";
+import { badChineseWords } from "./words/chinese";
+import { badEnglishWords } from "./words/english";
+import { badFrenchWords } from "./words/french";
+import { badGermanWords } from "./words/german";
+import { badIndonesianWords } from "./words/indonesian";
+import { badItalianWords } from "./words/italian";
+import { badSpanishWords } from "./words/spanish";
+
+export interface FamilyFriendlyOptions {
+  allLanguages?: boolean; // Default: false IF any of the below are true, then this is true (by default)
+  includeEnglish?: boolean;
+  includeArabic?: boolean;
+  includeChinese?: boolean;
+  includeFrench?: boolean;
+  includeGerman?: boolean;
+  includeIndonesian?: boolean;
+  includeItalian?: boolean;
+  includeSpanish?: boolean;
+}
+
+// FamilyFriendly class
+// This class is used to detect or mask out, bad words in a string
+export class FamilyFriendly {
+  // The list of bad words
+  private badWords = new Set<string>();
+
+  constructor(options?: FamilyFriendlyOptions) {
+    const allFalse =
+      options &&
+      !options.includeEnglish &&
+      !options.includeArabic &&
+      !options.includeChinese &&
+      !options.includeFrench &&
+      !options.includeGerman &&
+      !options.includeIndonesian &&
+      !options.includeItalian &&
+      !options.includeSpanish;
+
+    // If allLanguages is true, then include all languages
+    if (allFalse || !options || options?.allLanguages) {
+      if (!options) options = {};
+      options.includeEnglish = true;
+      options.includeArabic = true;
+      options.includeChinese = true;
+      options.includeFrench = true;
+      options.includeGerman = true;
+      options.includeIndonesian = true;
+      options.includeItalian = true;
+      options.includeSpanish = true;
+    }
+
+    const allWords = Array.from("[]");
+
+    // If includeEnglish is true, then include the English words
+    if (options.includeEnglish) {
+      allWords.push(...badEnglishWords);
+    }
+
+    // If includeArabic is true, then include the Arabic words
+    if (options.includeArabic) {
+      allWords.push(...badArabicWords);
+    }
+
+    // If includeChinese is true, then include the Chinese words
+    if (options.includeChinese) {
+      allWords.push(...badChineseWords);
+    }
+
+    // If includeFrench is true, then include the French words
+    if (options.includeFrench) {
+      allWords.push(...badFrenchWords);
+    }
+
+    // If includeGerman is true, then include the German words
+    if (options.includeGerman) {
+      allWords.push(...badGermanWords);
+    }
+
+    // If includeIndonesian is true, then include the Indonesian words
+    if (options.includeIndonesian) {
+      allWords.push(...badIndonesianWords);
+    }
+
+    // If includeItalian is true, then include the Italian words
+    if (options.includeItalian) {
+      allWords.push(...badItalianWords);
+    }
+
+    // If includeSpanish is true, then include the Spanish words
+    if (options.includeSpanish) {
+      allWords.push(...badSpanishWords);
+    }
+
+    this.badWords = new Set(allWords);
+  }
+
+  // Returns true if the string contains a bad word
+  public containsBadWord(str: string): boolean {
+    for (const badWord of this.badWords) {
+      if (str.includes(badWord)) {
+        return true;
+      }
+    }
+    return false;
+  }
+
+  // Returns a string with bad words masked out
+  public maskBadWords(str: string, maskAs: string = "🤡"): string {
+    for (const badWord of this.badWords) {
+      str = str.replaceAll(badWord, maskAs.repeat(badWord.length));
+    }
+    return str;
+  }
+}
diff --git a/src/app.ts b/src/app.ts
deleted file mode 100644
index e69de29..0000000